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GW231224_024321 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW231224_024321

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW231224_024321

Both component-mass lower bounds exceed 3 solar masses

Primary mass9.3 M☉

Secondary mass7.31 M☉

ObservedDec 24, 2023

Event identity

Classification and release

ID: gwtc:GW231224_024321
Event name: GW231224_024321
Classification: Binary Black Hole
Composition status: Confirmed
Confidence boundary: Both component-mass lower bounds exceed 3 solar masses
Catalog: GWTC-4.1
Preferred event version: v2
Observed at: Sunday, December 24, 2023 at 2:43:22 AM UTC UTC
GPS time: 1,387,421,020

Source-frame posterior

Component and remnant masses

Primary mass: 9.3 (-1.1, +2.1) M☉
Secondary mass: 7.31 (-1.31, +0.97) M☉
Remnant mass: 15.89 (-0.77, +1.24) M☉
Effective spin: -0.01
Network SNR: 14

Propagation

Distance and statistical context

Luminosity distance: 950 (-400, +280) Mpc
Redshift: 0.19
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-4.1

GW231224_024321

Last synchronized 9/12/2026, 3:20:17 AM UTC.

JSON record GWOSC event page